<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>day08作业1</title>
    <style>
        *{
            margin: 0px;
            border: 0px;
        }
.bule{
    background-color: skyblue;
    width: 250px;height: 230px;
    position: relative;
    left: 100px;

}
.black{
background-color: black;
width: 120px;height: 120px;
position: relative;
left: 50px; top: -110px;

}
.green{
background-color: greenyellow;
width: 180px;height: 180px;
position: relative;
left: 130px;top: -200px;
}
.red{
background-color: red;
width: 600px; height: 250px;
position: relative;
left: 230px; top: -480px;
}
.yellow{
background-color: yellow;
width: 140px;height: 50px;
position: absolute;
left: 460px;
top: 200px;
}

    </style>
</head>
<body>
   <div class="bule"></div> 
   <div class="black"></div>
   <div class="green"></div>
   <div class="red">
       <div class="yellow"></div>
   </div>
</body>
</html>